CN102286673A - Preparation method of CuCr25Me alloy cast blank - Google Patents
Preparation method of CuCr25Me alloy cast blank Download PDFInfo
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- CN102286673A CN102286673A CN 201110249322 CN201110249322A CN102286673A CN 102286673 A CN102286673 A CN 102286673A CN 201110249322 CN201110249322 CN 201110249322 CN 201110249322 A CN201110249322 A CN 201110249322A CN 102286673 A CN102286673 A CN 102286673A
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Abstract
The invention relates to a preparation method of a CuCr25Me alloy cast blank, and the preparation method comprises the following steps: firstly smelting total Me and Cu in a certain ratio into an intermediate alloy, then melting the intermediate alloy obtained by smelting Me and Cu, Cr and the balance of Cu in a vacuum induction furnace to obtain an alloy liquid phase, then introducing argon gas, maintaining the pressure, stirring, refining, and finally casting in a water cooling mold to form a cast blank, namely CuCr25Me alloy cast blank. The CuCr25Me alloy cast blank contains the elements in percentage by weight: 25% of Cr, 0.5-2% of Me and 73-74.5% of Cu. The finally obtained CuCr25Me alloy cast blank material has electrical conductivity being up to 30 Ms/m, the oxygen and nitrogen contents are separately controlled at below 300 and 500 ppm, and the size of the Cr particles in the alloy is 6-15 mu m; and the CuCr25Me alloy cast blank has the advantages of compact structure, fine and uniform grains, low gas content and high electrical conductivity.
Description
Technical field
The present invention relates to a kind of castmethod of alloy material, relate in particular to a kind of preparation method of CuCr25Me alloy strand.
Background technology
Immiscible alloy is the alloy that there is the liquid phase separation characteristic in a class, and known immiscible alloy has kind more than 500.Because the two-phase density difference is bigger usually in such alloy, often causes serious gravity segregation in the preparation process, has limited the development and application of such alloy.If by appropriate means the disperse of minority phase is distributed, the special physicals that many immiscible alloy showed, mechanical property will make it have a good application prospect.Chromiumcopper (as CuCr25) is exactly typical case's representative of immiscible alloy.Because chromiumcopper has intensity and hardness height, thermal conductivity and good conductivity and the strong advantage of erosion resistance, can be widely used in preparing the product that resistance electrode, power tool diverter, iec switch and electric motor ring header etc. require high-strength highly-conductive, demonstrate wide application prospect especially in the especially high-power vacuum switch.
Studies show that, in copper-chromium contact material, add separately or compound interpolation elemental selenium, tellurium that all can improve the physical strength and the hardness of chromiumcopper material, the chromium phase in the reinforced alloys tissue is improved the electric withstand voltage and break performance of contact.Yet in copper-chromium contact material, add the constituent element of other elements, promptly during the 3rd constituent element, the 3rd constituent element that is added must be distributed in the alloy in homodisperse mode, if the element constituent element that adds distributes inhomogeneously, the interpolation element that will cause chromium in the alloy to depend on reunion is grown up, form the segregation of chromium phase, thereby cause the chromiumcopper performance decrease.In order to make the 3rd constituent element homodisperse that adds, generally adopt powder metallurgic method at present.
Powder metallurgic method is by a certain percentage, with copper powder, chromium powder and the 3rd constituent element powder thorough mixing, press forming under protective atmosphere of certain particle size, and under protective atmosphere sintering.Powder metallurgic method is fairly simple, and alloying constituent is easy to control, but size between the chromium particle and spacing are excessive, and homogeneity of structure is lower, and oxygen and nitrogen content are too high in the contact material of this method preparation, has reduced the electric current breaking capacity of contact.
Summary of the invention
Technical problem to be solved by this invention is the deficiency that overcomes the preparation method who has the chromiumcopper that is used for electrical contact now, a kind of preparation method of CuCr25Me alloy strand is provided, promptly adopt vacuum casting and water cooled mo(u)ld refrigerative method manufactured copper chromium alloy material, with the purpose that alloy material dense structure, crystal grain are tiny evenly, gas content is low, specific conductivity is high that reaches preparation.
Technical scheme of the present invention
A kind of preparation method of CuCr25Me alloy strand, promptly the copper of the master alloy that at first whole Me and copper is smelted into by a certain percentage, the master alloy, chromium and the surplus that again Me and copper are smelted into is fused into alloy liquid phase in vacuum induction furnace, pass through argon filling, pressurize, stirring, refining then, in water cooled mo(u)ld, be cast into CuCr25Me alloy strand at last;
The amount of contained each element is counted by weight percentage in the described CuCr25Me alloy strand, and it is composed as follows:
Chromium 25%
Me 0.5－2％
Copper 73-74.5%
Wherein said Me is any in selenium (Se), the tellurium (Te).
The preparation method of above-mentioned a kind of CuCr25Me alloy strand specifically comprises following processing step:
(1), at first the copper with whole Me and part is smelted into master alloy, promptly obtains the master alloy that Me and copper are smelted into;
In the master alloy that described copper and Me are smelted into, used copper and Se proportional quantity, it is copper that components by weight percentage is calculated: Se is 40～60%:40～60%;
(2), the Me of the copper of chromium, surplus and step (1) gained and the master alloy that copper is smelted into are added vacuum induction furnace, the vacuum induction stove evacuation reaches in the stove vacuum tightness less than 1 * 10 then
-1 Pa, and temperature arrives 1600-1800 ℃ in the process furnace;
(3), treat that metal melts fully in all stoves after, charging into argon gas and keep furnace pressure in vacuum induction furnace is 10-50kPa;
(4), the alloy liquation that is smelted into is injected water cooled mo(u)ld to cast strand, in casting cycle this water cooled mo(u)ld around feed recirculated cooling water all the time, make pouring temperature remain on 1350-1550 ℃, after casting is finished, final a kind of CuCr25Me alloy strand of the present invention.
A kind of CuCr25Me alloy of above-mentioned gained strand conductivity of electrolyte materials can reach 30(Ms/m), the content of oxygen and nitrogen can be controlled at respectively 300 and 50ppm under, the chromium granular size is at the 6-15 micron in the alloy.
Beneficial effect of the present invention
The preparation method of CuCr25Me alloy strand of the present invention uses vacuum casting manufactured chromiumcopper; adopt protection melting of high vacuum and inert gas argon and cast alloys; make the gas content in the chromiumcopper obtain better controlled; particularly greatly reduce the content of oxygen; thereby improved the conductivity performance and the electric current breaking capacity of material, its specific conductivity has improved more than 30%.
In addition, CuCr25Me alloy strand of the present invention owing to added elemental selenium, tellurium in chromiumcopper, has improved the physical strength and the hardness of CuCr25Me alloy strand, and the chromium phase in the reinforced alloys tissue is improved the electric withstand voltage and break performance of contact.
The present invention has simultaneously adopted water cooled mo(u)ld that cast alloys is quickened cooling, therefore can make the alloy liquation keep certain setting rate, the segregation of large-scale chromium can not appear, thereby when making high temperature in the liquid alloy uniform mixing state of each constituent element remain to cooled solid-state, wherein the chromium particle is more tiny, it is more even to distribute, the chromium granular size is at the 6-15 micron in the CuCr25Me alloy strand of employing the present invention preparation, so the contact material dense structure of preparation, performance has obtained bigger improvement.
Embodiment
Below by embodiment the present invention is further set forth, but do not limit the present invention.
Embodiment 1
A kind of CuCr25Se alloy strand material, wherein the amount of contained each element is counted by weight percentage, and it is composed as follows:
Chromium 25%
Se 0.5％
Copper 74.5%.
Above-mentioned a kind of CuCr25Se alloy strand preparation methods specifically comprises following processing step:
(1), at first whole Se and copper are smelted into master alloy, promptly obtain Me and copper is smelted into master alloy;
Described copper and Se are smelted in the master alloy, used copper and Se proportional quantity, and it is copper that components by weight percentage is calculated: Se is 1:1;
(2), the Se of the copper of chromium, surplus and step (1) gained and the master alloy that copper is smelted into are added vacuum induction furnace, the vacuum induction stove evacuation reaches in the stove vacuum tightness less than 1 * 10 then
-1 Pa, and temperature to 1800 ℃ in the process furnace;
(3), treat that metal melts fully in all stoves after, in vacuum induction furnace, charge into the rare gas element argon gas, and to keep furnace pressure be 50kPa;
(4), the alloy liquation that is smelted into is injected water cooled mo(u)ld, feed recirculated cooling water all the time in the cooling-water duct in casting cycle around this water cooled mo(u)ld, make pouring temperature remain on 1550 ℃, final a kind of CuCr25Se alloy strand material.
The CuCr25Se alloy strand of above-mentioned gained is measured by quantitative metallography, and wherein the chromium granular size is at the 6-15 micron.
The CuCr25Se alloy strand of above-mentioned gained, its physics and mechanical property see Table 1 after tested.
Embodiment 2
A kind of CuCr25Se alloy strand material, wherein the amount of contained each element is counted by weight percentage, and it is composed as follows:
Chromium 25%
Se 2％
Copper 73%.
Above-mentioned a kind of CuCr25Se alloy strand preparation methods specifically comprises following processing step:
(1), at first whole Se and copper are smelted into master alloy, promptly obtain Me and copper is smelted into master alloy;
Described copper and Se are smelted in the master alloy, used copper and Se proportional quantity, and it is copper that components by weight percentage is calculated: Se is 1:1;
(2), the Se of the copper of chromium, surplus and step (1) gained and the master alloy that copper is smelted into are added vacuum induction furnace, the vacuum induction stove evacuation reaches in the stove vacuum tightness less than 1 * 10 then
-1 Pa, and temperature to 1600 ℃ in the process furnace;
(3), treat that metal melts fully in all stoves after, in vacuum induction furnace, charge into the rare gas element argon gas, and to keep furnace pressure be 30kPa;
(4), the alloy liquation that is smelted into is injected water cooled mo(u)ld, feed recirculated cooling water all the time in the cooling-water duct in casting cycle around this water cooled mo(u)ld, make pouring temperature remain on 1350 ℃, final a kind of CuCr25Se alloy strand material.
The CuCr25Se alloy strand of above-mentioned gained is measured by quantitative metallography, and wherein the chromium granular size is at the 6-15 micron.
The CuCr25Se alloy strand of above-mentioned gained, its physics and mechanical property see Table 3 after tested.
A kind of CuCr25Se alloy strand material, wherein the amount of contained each element is counted by weight percentage, and it is composed as follows:
Chromium 25%
Se 2％
Copper 73%.
Above-mentioned a kind of CuCr25Se alloy strand preparation methods specifically comprises following processing step:
(1), at first whole Se and copper are smelted into master alloy, promptly obtain Me and copper is smelted into master alloy;
Described copper and Se are smelted in the master alloy, used copper and Se proportional quantity, and it is copper that components by weight percentage is calculated: Se is 2:3;
(2), the Se of the copper of chromium, surplus and step (1) gained and the master alloy that copper is smelted into are added vacuum induction furnace, the vacuum induction stove evacuation reaches in the stove vacuum tightness less than 1 * 10 then
-1 Pa, and temperature to 1700 ℃ in the process furnace;
(3), treat that metal melts fully in all stoves after, in vacuum induction furnace, charge into the rare gas element argon gas, and to keep furnace pressure be 30kPa;
(4), the alloy liquation that is smelted into is injected water cooled mo(u)ld, feed recirculated cooling water all the time in the cooling-water duct in casting cycle around this water cooled mo(u)ld, make pouring temperature remain on 1450 ℃, final a kind of CuCr25Se alloy strand material.
The CuCr25Se alloy strand of above-mentioned gained is measured by quantitative metallography, and wherein the chromium granular size is at the 6-15 micron.
The CuCr25Se alloy strand of above-mentioned gained, its physics and mechanical property see Table 4 after tested.
A kind of CuCr25Te alloy strand material, wherein the amount of contained each element is counted by weight percentage, and it is composed as follows:
Chromium 25%
Te 2％
Copper 73%.
Above-mentioned a kind of CuCr25Te alloy strand preparation methods specifically comprises following processing step:
(1), at first whole Te and copper are smelted into master alloy, promptly obtain Me and copper is smelted into master alloy;
Described copper and Te are smelted in the master alloy, used copper and Se proportional quantity, and it is copper that components by weight percentage is calculated: Te is 1:1;
(2), the Te of the copper of chromium, surplus and step (1) gained and the master alloy that copper is smelted into are added vacuum induction furnace, the vacuum induction stove evacuation reaches in the stove vacuum tightness less than 1 * 10 then
-1 Pa, and temperature to 1650 ℃ in the process furnace;
(3), treat that metal melts fully in all stoves after, in vacuum induction furnace, charge into the rare gas element argon gas, and to keep furnace pressure be 30kPa;
(4), the alloy liquation that is smelted into is injected water cooled mo(u)ld, feed recirculated cooling water all the time in the cooling-water duct in casting cycle around this water cooled mo(u)ld, make pouring temperature remain on 1350 ℃, final a kind of CuCr25Te alloy strand material.
The CuCr25Te alloy strand of above-mentioned gained is measured by quantitative metallography, and wherein the chromium granular size is at the 6-15 micron.
The CuCr25Te alloy strand of above-mentioned gained, its physics and mechanical property see Table 5 after tested.
A kind of CuCr25Te alloy strand material, wherein the amount of contained each element is counted by weight percentage, and it is composed as follows:
Chromium 25%
Te 1％
Copper 74%.
Above-mentioned a kind of CuCr25Te alloy strand preparation methods specifically comprises following processing step:
(1), at first whole Te and copper are smelted into master alloy, promptly obtain Me and copper is smelted into master alloy;
Described copper and Te are smelted in the master alloy, used copper and Se proportional quantity, and it is copper that components by weight percentage is calculated: Te is 2:3;
(2), the Te of the copper of chromium, surplus and step (1) gained and the master alloy that copper is smelted into are added vacuum induction furnace, the vacuum induction stove evacuation reaches in the stove vacuum tightness less than 1 * 10 then
-1 Pa, and temperature to 1700 ℃ in the process furnace;
(3), treat that metal melts fully in all stoves after, in vacuum induction furnace, charge into the rare gas element argon gas, and to keep furnace pressure be 30kPa;
(4), the alloy liquation that is smelted into is injected water cooled mo(u)ld, feed recirculated cooling water all the time in the cooling-water duct in casting cycle around this water cooled mo(u)ld, make pouring temperature remain on 1550 ℃, final a kind of CuCr25Te alloy strand material.
The CuCr25Te alloy strand of above-mentioned gained is measured by quantitative metallography, and wherein the chromium granular size is at the 6-15 micron.
The CuCr25Te alloy strand of above-mentioned gained, its physics and mechanical property see Table 6 after tested.
A kind of CuCr25Te alloy strand material, wherein the amount of contained each element is counted by weight percentage, and it is composed as follows:
Chromium 25%
Te 0.5％
Copper 74.5%.
Above-mentioned a kind of CuCr25Te alloy strand preparation methods specifically comprises following processing step:
(1), at first whole Te and copper are smelted into master alloy, promptly obtain Me and copper is smelted into master alloy;
Described copper and Te are smelted in the master alloy, used copper and Se proportional quantity, and it is copper that components by weight percentage is calculated: Te is 2:3;
(2), the Te of the copper of chromium, surplus and step (1) gained and the master alloy that copper is smelted into are added vacuum induction furnace, the vacuum induction stove evacuation reaches in the stove vacuum tightness less than 1 * 10 then
-1 Pa, and temperature to 1700 ℃ in the process furnace;
(3), treat that metal melts fully in all stoves after, in vacuum induction furnace, charge into the rare gas element argon gas, and to keep furnace pressure be 30kPa;
(4), the alloy liquation that is smelted into is injected water cooled mo(u)ld, feed recirculated cooling water all the time in the cooling-water duct in casting cycle around this water cooled mo(u)ld, make pouring temperature remain on 1750 ℃, final a kind of CuCr25Te alloy strand material.
The CuCr25Te alloy strand of above-mentioned gained is measured by quantitative metallography, and wherein the chromium granular size is at the 6-15 micron.
The CuCr25Te alloy strand of above-mentioned gained, its physics and mechanical property see Table 7 after tested.
Claims (5)
1. the preparation method of a CuCr25Me alloy strand, the copper of the master alloy that it is characterized in that at first whole Me and copper are smelted into by a certain percentage, the master alloy, chromium and the surplus that again Me and copper are smelted into is fused into alloy liquid phase in vacuum induction furnace, pass through argon filling, pressurize, stirring, refining then, in water cooled mo(u)ld, be cast into CuCr25Me alloy strand at last;
The amount of contained each element is counted by weight percentage in the described CuCr25Me alloy strand, promptly
Chromium 25%
Me 0.5－2％
Copper 73-74.5%
Wherein said Me is any in selenium, the tellurium.
2. the preparation method of a kind of CuCr25Me alloy strand as claimed in claim 1, it is characterized in that used copper and Se proportional quantity in the master alloy that described whole Me and copper is smelted into by a certain percentage, it is copper that components by weight percentage is calculated: Se is 40～60%:40～60%.
3. the preparation method of CuCr25Me alloy strand as claimed in claim 2, it is characterized in that in the master alloy that described whole Me and copper is smelted into by a certain percentage, used copper and Se proportional quantity, it is copper that components by weight percentage is calculated: Se is preferably 40～50%:50～60%.
4. as the preparation method of claim 1,2 or 3 described a kind of CuCr25Me alloy strands, it is characterized in that
Specifically comprise the steps:
(1), at first with the copper of whole Me with part, be smelted into master alloy according to certain ratio, promptly obtain Me and copper is smelted into master alloy;
(2), the Me of the copper of chromium, surplus and step (1) gained and the master alloy that copper is smelted into are added vacuum induction furnace, the vacuum induction stove evacuation reaches in the stove vacuum tightness less than 1 * 10 then
-1 Pa, and temperature arrives 1600-1800 ℃ in the process furnace;
(3), treat that metal melts fully in all stoves after, charging into argon gas and keep furnace pressure in vacuum induction furnace is 10-50kPa;
(4), the alloy liquation that is smelted into is injected water cooled mo(u)ld to cast strand, in casting cycle this water cooled mo(u)ld around feed recirculated cooling water all the time, make pouring temperature remain on 1350-1550 ℃, casting finishes that the back is final must a kind of CuCr25Me alloy strand of the present invention.
5. a kind of CuCr25Me of preparation method's gained of a kind of CuCr25Me alloy strand as claimed in claim 4
The alloy strand, the amount that it is characterized in that contained each element in the described CuCr25Me alloy strand is percentage by weight
It is composed as follows than calculating:
Chromium 25%
Me 0.5－2％
Copper 73-74.5%
Wherein said Me is any in selenium, the tellurium.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103706783A (en) * | 2013-10-15 | 2014-04-09 | 陕西斯瑞工业有限责任公司 | High-fusion-welding-resistance CuCr40Te contact material and preparation method thereof |
| CN105463238A (en) * | 2015-12-24 | 2016-04-06 | 济南大学 | Cu-Cr electrical contact material and preparation method thereof |
| CN111206163A (en) * | 2020-01-10 | 2020-05-29 | 陕西斯瑞新材料股份有限公司 | Preparation method of CuCr contact with high Te content |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1041975A (en) * | 1987-11-02 | 1990-05-09 | 西门子公司 | The manufacture method of molten material and be used for the consumable electrode of this method |
| CN1612275A (en) * | 2003-10-31 | 2005-05-04 | 日本Ae帕瓦株式会社 | Electrical contact, method of manufacturing the same, electrode for vacuum interrupter, and vacuum circuit breaker |
| JP2009170372A (en) * | 2008-01-21 | 2009-07-30 | Hitachi Ltd | Electrical contact for vacuum valve |
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2011
- 2011-08-29 CN CN 201110249322 patent/CN102286673B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1041975A (en) * | 1987-11-02 | 1990-05-09 | 西门子公司 | The manufacture method of molten material and be used for the consumable electrode of this method |
| CN1612275A (en) * | 2003-10-31 | 2005-05-04 | 日本Ae帕瓦株式会社 | Electrical contact, method of manufacturing the same, electrode for vacuum interrupter, and vacuum circuit breaker |
| JP2009170372A (en) * | 2008-01-21 | 2009-07-30 | Hitachi Ltd | Electrical contact for vacuum valve |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103706783A (en) * | 2013-10-15 | 2014-04-09 | 陕西斯瑞工业有限责任公司 | High-fusion-welding-resistance CuCr40Te contact material and preparation method thereof |
| CN105463238A (en) * | 2015-12-24 | 2016-04-06 | 济南大学 | Cu-Cr electrical contact material and preparation method thereof |
| CN105463238B (en) * | 2015-12-24 | 2017-08-25 | 济南大学 | A kind of copper chromium electrical contact material and preparation method thereof |
| CN111206163A (en) * | 2020-01-10 | 2020-05-29 | 陕西斯瑞新材料股份有限公司 | Preparation method of CuCr contact with high Te content |
| WO2021139245A1 (en) * | 2020-01-10 | 2021-07-15 | 陕西斯瑞新材料股份有限公司 | Method for preparing high te content cucr contact |
| JP2022548707A (en) * | 2020-01-10 | 2022-11-21 | シャンシー シルイ アドバンスド マテリアルズ カンパニー リミテッド | Manufacturing method of CuCr contact with high Te content |
| JP7434534B2 (en) | 2020-01-10 | 2024-02-20 | シャンシー シルイ アドバンスド マテリアルズ カンパニー リミテッド | Method for manufacturing CuCr contacts with high Te content |
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